At just 14 years old, Shion Yamaguchi enters Shiketsu High School, a prestigious academy at the west known for its rivalry with U.A. High. With a cool, enigmatic demeanor and an unshakable resolve, Shion stands out among his peers-though he prefers to remain unseen. His Quirk, "Echo Pulse," grants him control over sound waves, allowing him to detect movement, disorient enemies, and even propel himself through the air.
But beneath his quiet exterior lies a storm.
A past shrouded in tragedy. A mystery left unanswered. And a world of heroes that may not be as noble as it seems.
As Shion trains alongside his classmates, he finds himself walking a dangerous path-one that leads him deeper into the shadows. With every step, his search for truth blurs the line between hero and vigilante. And soon, the name "The Phantom" will be whispered through the underground, a ghost in the night who seeks justice in ways the world isn't ready for.
As tensions rise and hidden enemies begin to stir, Shion must decide: will he uphold the ideals of hero society, or forge his own path in the dark?
The echoes of the past call to him. And his journey has only just begun.